The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1994
Filed:
Jul. 13, 1992
Applicant:
Inventors:
J Bruce Pitner, Durham, NC (US);
Randal A Hoke, Cary, NC (US);
Assignee:
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549394 ; 549227 ;
Abstract
Fluorescent pH indicator compounds which exhibit an increase in fluorescence intensity with decreasing pH. The indicators are derivatives of rhodamine and sulforhodamine type dyes and are particularly useful for measuring pH in acidic environments such as carbon dioxide production by microorganisms and pH of certain acidic intracellular compartments.